W49V002FAQ datasheet(23/32 Pages) WINBOND

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W49V002FA

Publication Release Date: February 19, 2002

- 23 -

Revision A2

Timing Waveforms for FWH Interface Mode, continued

Program Cycle Timing Diagram

FWH4

#RESET

FWH[3:0 ]

1st Start

IDSEL

Load Address "5555" in 7 Clocks

CLK

1 Clock

2 Clocks

Load Data "AA" in 2 Clocks

1010b

Write the 1st command to the device in FWH mode.

2nd Start

Load Address "2AAA" in 7 Clocks

1 Clock

2 Clocks

Load Data "55"

in 2 Clocks

0101b

Write the 2nd command to the device in FWH mode.

3rd Start

Load Address "5555" in 7 Clocks

1 Clock

2 Clocks

Load Data "A0"

in 2 Clocks

1010b

0000b

Write the 3rd command to the device in FWH mode.

4th Start

Load Ain in 7 Clocks

FWH4

FWH[3:0 ]

CLK

FWH4

FWH[3:0 ]

CLK

FWH4

FWH[3:0 ]

CLK

Sync

Internal

program start

TAR

1 Clock

2 Clocks

A[15:12]

Load Din in 2 Clocks

D[7:4]

Write the 4th command(target location to be programmed) to the device in FWH mode.

A[11:8]

A[7:4]

A[3:0]

D[3:0]

1111b

Tri-State

0000b

Data

Address

Sync

TAR

Data

Sync

TAR

Data

Sync

TAR

Data

1111b

Tri-State

0000b

1111b

Tri-State

0000b

1111b

Tri-State

0000b

IDSEL

Internal

program start

IDSEL

0000b

X101b

0101b

X010b

1010b

X101b

0101b

M Size

XXXXb

XXA[17:16]b

XXXXb

1 Clock

0000b

1110b

1 Clock

0000b

1110b

1 Clock

0000b

1110b

1 Clock

0000b

1110b

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

Start next

command

1 Clock

2 Clocks

TAR

1111b

Tri-State

TAR

2 Clocks

1111b Tri-State

#RESET

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